If the pack does not import directly, try these methods based on:
hovertextfixpackmcpe121.mcpack refers to a Minecraft Bedrock Edition (MCPE) resource pack designed to fix or optimize item tooltips for version file name hovertextfixpackmcpe121mcpack link
Choose and delete the .zip portion from the very end. If the pack does not import directly, try
The following information covers the hovertextfixpackmcpe121.mcpack file name hovertextfixpackmcpe121mcpack link