"Add Step - Call Test" just keeps spinning and then thrown an: Required field error

Description
"Add Step - Call Test" turns error "Unexpected Token" not loading Tests. When selecting the dropdown list, it keeps spinning.

It can also show the error: Required Field error.

How to reproduce

1. Open a Test
2. Click to Add Step
3. Choose Call Test
4. Write the Issue Key in the search bar
5. In the dropdown list the wheel starts rolling and no Tests appear

Actual result/Attachments

Unable to select the Test, even if writing down the Issue Key, the Test is not loaded to be selected.

Expected result

The search finishes successfully and Tests are displayed as options.