"Not valid template file": Searches for backend extension files in frontend

[cindy_jin]

I recently upgraded from Magento 1.8 to 1.9. However, an extension called PaymentTracker that I use no longer works correctly. The extension's files are located in the backend directories, but Magento keeps looking for them in frontend and throws the same error:

2020-04-13T17:06:40+00:00 CRIT (2): Not valid template file:frontend/base/default/template/PaymentTracker/MultiplePayment/Info.phtml
2020-04-13T17:09:35+00:00 CRIT (2): Not valid template file:frontend/base/default/template/PaymentTracker/MultiplePayment/Info.phtml
2020-04-13T17:10:56+00:00 CRIT (2): Not valid template file:frontend/base/default/template/PaymentTracker/MultiplePayment/Info.phtml
2020-04-13T17:11:33+00:00 CRIT (2): Not valid template file:frontend/base/default/template/PaymentTracker/MultiplePayment/Info.phtml

How can I direct Magento to the correct files?

[Mukesh Tiwari]

Hi @cindy_jin 

Can you share config.xml of this module? It may help to debug.