An internal error occurred during: "Importing Maven projects"

[POLA36]

Describe the bug
An internal error occurred during: "Importing Maven projects"

To Reproduce
Went I try importing my project on sts i'm having this issue

Sample
An internal error occurred during: "Importing Maven projects".
org/springframework/tooling/boot/ls/xml/XMLRootElementContentDescriber2$QualifiedElement

[BoykoAlex]

Can you provide the stack trace for the exception? You should be able to find it in the error log... If you could share a sample project that reproduces the issue that'd be even better.
If you'd like to workaround the issue you could disable XML Language server in the preferences under Language Servers. There is a table with file extensions <-> language server mapping. Uncheck rows where XML language server is present.