Describe the bug
When working on a sketch pulled from the cloud the user doesn't get any error marker/underline in the code editor. It makes a lot difficult to debug and troubleshoot the remote sketch.

To Reproduce
Steps to reproduce the behavior:

1. Go to web editor at https://create.arduino.cc/editor and Login
2. Open blink example clicking the voice from left sidebar 'example' > '01. BASICS (6)' > 'blink.ino'
3. Try to modify the sketch and when prompted by the dialog box save it as 'blink_test'
4. Delete the last semicolon at line 36
5. Open the IDE 2 software
6. Go to sketchbook explorer clicking the first voice on left sidebar
7. Open remote sketchbooks clicking on 🌐 tab in the sidebar
8. Pull 'blink_test' clicking on down arrow icon on the right of the sketch's name
9. Open the pulled sketch double clicking on 'blink_test' on the sidebar
10. Try to verify -> it will give an error but no red underline at the end of line 36
11. Save the sketch locally pressing CMD/Ctrl + Shift + S, save it in Arduino folder.
12. Check line 36 and you will see the error underline where the semicolon is missing.

Expected behavior
I expect to see the same behaviour of local sketches: if an error is present in the code I expect it to be red underlined and a red marker to be present in the scrollbar area in the far right.

Screenshots

Desktop (please complete the following information):

• OS: All
• Version: 2.0.0 beta 12

Additional context
It seems not caused by a language server crash