When some JQL references an object by a string that is not acceptable as a valid object key (as a filter name), the import breaks

See attached screenshot for the error message. It was surely caused by this line within a quick filter:

<jqlQuery>filter =“ADSK - MB2” </jqlQuery>

This error occurs when the JQL query that will be imported contains references to objects by strings that do not correspond to the ones used to identify those objects within the XML file. This string is often the object name, but there are exceptions, that could be prone to this error.

The most likely case is the one shown in the error above.