Error is thrown when running a job

[Reinmar]

When running a is:unit job for CKEditor 5, at some point this can be noticed:

info: Client 4e889ad4-58a5-490a-94e7-3c5f9daa58f0 runs test /jobs/7P0q1Pv7ptkQnoBc/tests/build/amd/tests/engine/dataprocessor/htmldataprocessor
error: [middleware-jobs]  TypeError: Path must be a string. Received true
    at assertPath (path.js:7:11)
    at Object.extname (path.js:1429:5)
    at processFile (/www/ckeditor5/ckeditor5/node_modules/benderjs-coverage/lib/preprocessor.js:33:10)
    at runTask (/www/ckeditor5/ckeditor5/node_modules/when/pipeline.js:37:16)
    at /www/ckeditor5/ckeditor5/node_modules/when/pipeline.js:42:12
    at tryCatchResolve (/www/ckeditor5/ckeditor5/node_modules/when/lib/apply.js:46:23)
    at callAndResolve (/www/ckeditor5/ckeditor5/node_modules/when/lib/apply.js:30:12)
    at callAndResolveNext (/www/ckeditor5/ckeditor5/node_modules/when/lib/apply.js:40:4)
    at tryCatchReject3 (/www/ckeditor5/ckeditor5/node_modules/when/lib/makePromise.js:856:7)
    at runContinuation3 (/www/ckeditor5/ckeditor5/node_modules/when/lib/makePromise.js:814:4)
    at Fulfilled.fold (/www/ckeditor5/ckeditor5/node_modules/when/lib/makePromise.js:588:4)
    at callAndResolve (/www/ckeditor5/ckeditor5/node_modules/when/lib/apply.js:34:12)
error: Test error: Uncaught Error: Deferment unlock timeout - "2" never unlocked
info: Client 4e889ad4-58a5-490a-94e7-3c5f9daa58f0 completed /jobs/7P0q1Pv7ptkQnoBc/tests/build/amd/tests/engine/dataprocessor/htmldataprocessor - FAILED
error: /jobs/7P0q1Pv7ptkQnoBc/tests/build/amd/tests/engine/dataprocessor/htmldataprocessor FAILED
Script error

Uncaught Error: Deferment unlock timeout - "2" never unlocked