I tried to evaluate php tools with Visual Studio:
Microsoft Visual Studio Professional 2019 Version 16.5.2
on Microsoft Windows 10 Enterprise Version 10.0.17134 Build 17134
Neither PHP tools 1.40.12103 nor 1.40.12223 will start.
ActivityLog:
<entry>
    <record>764</record>
    <time>2020/11/03 11:21:14.415</time>
    <type>Information</type>
    <source>VisualStudio</source>
    <description>Begin package load [ComposerPackage]</description>
    <guid>{52323E24-8E37-4959-B894-8BA2026BFBC4}</guid>
  </entry>
  <entry>
    <record>765</record>
    <time>2020/11/03 11:21:14.423</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>SetSite failed for package [ComposerPackage]Source: &apos;Devsense.VisualStudio.Composer&apos; Description: Could not load file or assembly &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. The system cannot find the file specified.&#x000D;&#x000A;System.IO.FileNotFoundException: Could not load file or assembly &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. The system cannot find the file specified.&#x000D;&#x000A;File name: &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos;&#x000D;&#x000A;   at Devsense.VisualStudio.Composer.ComposerPackage.InitializeAsync(CancellationToken cancellationToken, IProgress`1 progress)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.AsyncPackage.&lt;&gt;c__DisplayClass20_0.&lt;&lt;Microsoft-VisualStudio-Shell-Interop-IAsyncLoadablePackageInitialize-Initialize&gt;b__1&gt;d.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Threading.JoinableTask.&lt;JoinAsync&gt;d__68.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.GetResult()&#x000D;&#x000A;&#x000D;&#x000A;WRN: Assembly binding logging is turned OFF.&#x000D;&#x000A;To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.&#x000D;&#x000A;Note: There is some performance penalty associated with assembly bind failure logging.&#x000D;&#x000A;To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].&#x000D;&#x000A;</description>
    <guid>{52323E24-8E37-4959-B894-8BA2026BFBC4}</guid>
    <hr>80070002</hr>
    <errorinfo></errorinfo>
  </entry>
  <entry>
    <record>766</record>
    <time>2020/11/03 11:21:14.439</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>End package load [ComposerPackage]</description>
    <guid>{52323E24-8E37-4959-B894-8BA2026BFBC4}</guid>
    <hr>80070002</hr>
    <errorinfo></errorinfo>
  </entry>
  <entry>
    <record>767</record>
    <time>2020/11/03 11:21:14.831</time>
    <type>Information</type>
    <source>UserConnection</source>
    <description>user authentication successful for IDE user</description>
  </entry>
  <entry>
    <record>768</record>
    <time>2020/11/03 11:21:15.260</time>
    <type>Information</type>
    <source>VisualStudio</source>
    <description>Begin package load [ProjectSystemPackage]</description>
    <guid>{8716B03B-8A63-4FAB-A1DB-81FB3918374A}</guid>
  </entry>
  <entry>
    <record>769</record>
    <time>2020/11/03 11:21:15.270</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>SetSite failed for package [ProjectSystemPackage]Source: &apos;Devsense.VisualStudio.ProjectSystem&apos; Description: Could not load file or assembly &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. The system cannot find the file specified.&#x000D;&#x000A;System.IO.FileNotFoundException: Could not load file or assembly &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos; or one of its dependencies. The system cannot find the file specified.&#x000D;&#x000A;File name: &apos;Microsoft.VisualStudio.Threading, Version=16.6.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos;&#x000D;&#x000A;   at Devsense.VisualStudio.ProjectSystem.ProjectSystemPackage.InitializeAsync(CancellationToken cancellationToken, IProgress`1 progress)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.AsyncPackage.&lt;&gt;c__DisplayClass20_0.&lt;&lt;Microsoft-VisualStudio-Shell-Interop-IAsyncLoadablePackageInitialize-Initialize&gt;b__1&gt;d.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Threading.JoinableTask.&lt;JoinAsync&gt;d__68.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.GetResult()&#x000D;&#x000A;&#x000D;&#x000A;WRN: Assembly binding logging is turned OFF.&#x000D;&#x000A;To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.&#x000D;&#x000A;Note: There is some performance penalty associated with assembly bind failure logging.&#x000D;&#x000A;To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].&#x000D;&#x000A;</description>
    <guid>{8716B03B-8A63-4FAB-A1DB-81FB3918374A}</guid>
    <hr>80070002</hr>
    <errorinfo></errorinfo>
  </entry>
  <entry>
    <record>770</record>
    <time>2020/11/03 11:21:15.279</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>End package load [ProjectSystemPackage]</description>
    <guid>{8716B03B-8A63-4FAB-A1DB-81FB3918374A}</guid>
    <hr>80070002</hr>
    <errorinfo></errorinfo>
  </entry>
  <entry>
    <record>771</record>
    <time>2020/11/03 11:21:15.811</time>
    <type>Information</type>
    <source>VisualStudio</source>
    <description>Begin package load [PhpTestPackage]</description>
    <guid>{36E83D64-0D9D-4A14-9A17-ABE323C6F91B}</guid>
  </entry>
  <entry>
    <record>772</record>
    <time>2020/11/03 11:21:15.821</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>SetSite failed for package [PhpTestPackage]Source: &apos;Devsense.VisualStudio.Shell&apos; Description: Could not load type &apos;Microsoft.VisualStudio.Shell.ServiceProvider&apos; from assembly &apos;Microsoft.VisualStudio.Shell.Framework, Version=16.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos;.&#x000D;&#x000A;System.TypeLoadException: Could not load type &apos;Microsoft.VisualStudio.Shell.ServiceProvider&apos; from assembly &apos;Microsoft.VisualStudio.Shell.Framework, Version=16.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a&apos;.&#x000D;&#x000A;   at Devsense.VisualStudio.Shell.Services.get_GlobalProvider()&#x000D;&#x000A;   at Devsense.VisualStudio.Shell.Services.get_IFeedbackService()&#x000D;&#x000A;   at PHP.VisualStudio.TestAdapter.PhpTestPackage.&lt;InitializeAsync&gt;d__14.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Shell.AsyncPackage.&lt;&gt;c__DisplayClass20_0.&lt;&lt;Microsoft-VisualStudio-Shell-Interop-IAsyncLoadablePackageInitialize-Initialize&gt;b__1&gt;d.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)&#x000D;&#x000A;   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)&#x000D;&#x000A;   at Microsoft.VisualStudio.Threading.JoinableTask.&lt;JoinAsync&gt;d__68.MoveNext()&#x000D;&#x000A;--- End of stack trace from previous location where exception was thrown ---&#x000D;&#x000A;   at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw()&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.RethrowException(AggregateException e)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.InternalGetResult(Boolean ignoreUIThreadCheck)&#x000D;&#x000A;   at Microsoft.VisualStudio.Services.VsTask.GetResult()</description>
    <guid>{36E83D64-0D9D-4A14-9A17-ABE323C6F91B}</guid>
    <hr>80131522</hr>
    <errorinfo></errorinfo>
  </entry>
  <entry>
    <record>773</record>
    <time>2020/11/03 11:21:15.833</time>
    <type>Error</type>
    <source>VisualStudio</source>
    <description>End package load [PhpTestPackage]</description>
    <guid>{36E83D64-0D9D-4A14-9A17-ABE323C6F91B}</guid>
    <hr>80131522</hr>
    <errorinfo></errorinfo>
  </entry>