So, I recently left unity for about 4 - 6 weeks and hadn’t done any work or opened my project everything was working fine, Today I came back to my project and have a-lot of errors in the console from standard assets and sample scene.
Make a back up first, then choose Reset Packages to Default under the Help menu, then save and exit Unity. Delete the Library folder, and reopen the project. See if this helps.
Your image is too small to actually read any of the errors.