Assembly definition, TMPro and ES3 error

Hi!
I got TextMeshPro error notice when I don't add an assembly reference to my assembly. When I did it, ES3 starts to show errors instead. And it's vice-versa. What to do?

TMPro error: missing assembly reference
ES3 error: the name 'ES3' does not exist in the current context

Looks like it's something related to Assembly-CSharp-firstpass. But I'm not sure how to fix it.
Both TMPro and ES3(EasySave3) are located in the Plugins folder.

 

This may help you with intellisense and possibly other Visual Studio integration problems:

Sometimes the fix is as simple as doing Assets -> Open C# Project from Unity. Other times it requires more.

Other times it requires you also nuke the userprefs and .vsconfig and other crufty low-value high-hassle files that Visual Studio tends to slowly damage over time, then try the above trick.

Barring all that, move on to other ideas:

https://forum.unity.com/threads/intellisense-not-working-with-visual-studio-fix.836599/

Also, try update the VSCode package inside of Unity: Window -> Package Manager -> Search for Visual Studio Code Editor -> Press the Update button

Also, this: https://forum.unity.com/threads/no-suggestions-in-vscode.955197/#post-6227874

 

the error still persists after trying everything.
I decided to delete all of my assemblies to finally fix it.