Too many errors to count. You pick and choose.

[Serial-wombat]

Attached is an error log after the 4th attempt of building this stupid thing on Opensuse Leap 15.0. I'll let you figure it out. Good luck. Windows version works, but I build in linux now.
dlangide_build_errors.txt

[Nafees10]

Same as #398 , some issues with static import std.ascii; ( IDK, I didn't look much into it ).
Build log you attached is has same errors as that #398 issue.

[RobT2012]

The main problem seems to be that the source code has fallen a bit behind recent compiler/language changes. To resolve the issue, the code has to be updated to work with the latest version of DMD.