API V5 support is ending
The release of API V5 took place in the fall of 2017. Two years later, in the fall of 2019, the V6 version was released, since then V5 has been considered obsolete. Progress cannot be stopped, and starting from the fall of 2021, iikoRMS builds with V7 support will be released, which means that V6 will become obsolete, and V5 will no longer be supported (See more version control).
If you still have plugins on V5, now is the time to migrate them to V6, this version is supported by all Syrve Office released since September 2019 (7.0+) and will be supported until autumn 2023.