Why it popup 'error in application' everytime

[Android Central Question]

I'm a OnePlus 5T user...and holding an Airtel Sim..it always popup a error in application for Sim.. I have tried to force stop Sim toolkit...but this doesn't work...it is so annoying..I wish I could send a screenshot..help me out asap..

 

[ravi kumar91]

I am downloading in text font. But I am facing in error in application every five minutes in display what was the problem I need your help

 

[B. Diddy]

Welcome to Android Central! Does this happen in Safe Mode as well? https://www.androidexplained.com/oneplus-5-safe-mode/