1) Sites - Contracts
2) Create - Invoice
3) Click on the drop down list "Currency"
Expected result: the drop down list with available options is opened. The "Currency" field is filled in.
Actual result: the drop down list isn't opened. The "Currency" field can't be completed.

P.S. the "Currency" field is required where "Rouble" currency is set by default. The invoice is created with the "Rouble" currency option