Validation font on Bootstrap 4.5 editor.datatables becomes very large

[SimbaRepository]

If you are using sb-admin-2.css with https://editor.datatables.net/examples/simple/simple.html, everything works fine except for validation which prints extremely large font that fills the whole page (See this Screenshot )).

If I replace sb-admin-2.css with bootstrap bootstrap/4.5.0/css/bootstrap.min.css then the editor datatables validation font problem becomes solved...unfortunately the sb-admin-2 side menu becomes disintegrated because it seems sb-admin-2 cannot work directly with plain 4.5.0/css/bootstrap.min.css. What should I do to solve this problem were editor.datatables validation cant work with sb-admin-2?