You will get this invalid error id message because social Share plugin or java script code were set default by developer, we can replace app id code creating App on facebook .
How to fix it ?
# Goto your website post, Find the Social Sharing icons,
# Right Click on Facebook Share botton of your website and press on Inspect.
# Find The app id on Element, pannel, wich was located on social share/Facebook div, Then Copy That app id code (number only) .
# Goto blogger Theme, Edit Html and Press CTRL+F and paste that copied code on search box, press Enter. you will find the app id code which is invalid. Now you need to creat your own app id and replace on that app id code.
# Goto Facebook Developer. login with your facebook id .or if you have already loged in facebook facebook will redirect on developer dashboard.
# Then, Goto My App (Top right side ) , then choose Add new App . Give name and email id then press on Creat app. your new app Dashboard will open.
# Turn of Status (for make app live)
# Copy App id (if you get green signal live signal )
# Goto blogger then paste & Replace your new app id . and save templete.
Refresh your page and try to share post it's works 100%.
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