GoLand: Unresolved reference ‘NewFunction’

(I) describe

after the upgrade to Goland, all the package references prompt Unresolved reference ‘method name’.

(b) cause

The idea folder in the project before

was created by the old version of Goland and should contain some data incompatible with the new version.

(iii) solution

remove the. Idea folder from the project and Goland will be automatically regenerated.