[Bug] Game crashes in error upon mission completion

In the following screenshot, you can the error text I got after completing the first lane of the missions. I already completed the other 2 lanes before and just got to the last mission in the first lane. The mission where the fish first let’s you draw a full hand, then goes on to fully wipe your deck. I completed the mission and got the following error.

After logging back in all 3 lanes are now complete, but I wonder why my mission tracker on the right showed about 90/170 (ish) before I completed the mission, and now goes to tell me that all missions are completed.

Hellow @Xuudon! This Nullreference error has effected multiple people. It appears to happen sometimes during missions or puzzles. If you haven’t already, also submit the screen shot here. Thanks for helping to improve the game!