I just bought a new pack (Viqola mashup) and every single time I try to load a new or previously created world with it enabled, the game crashes before even fully loading the world.
This happens with other packs as well. Not every pack, but several.
Thank you for your report!
We're tracking this issue in MCPE-161657, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.
Quick Links:
📓 Bug Tracker Guidelines – 💬 Community Support – 📧 Mojang Support
📓 Project Summary – ✍️ Feedback and Suggestions – 📖 BDS Wiki – 📖 FAQs