Wordpress Theme Demo Data Importing Stuck

Wordpress Theme demo data importing Stucked. How it can be solved. Is it due to the max_upload_file_size? if due to this then how can i change the value? where i will be able to find this?

Which theme was it, Astra?

If it is max upload file size you can make the changes under PHP/Edit PHP configs, and choose the one you are using.