Error Upgrade Magento 1.6 to 1.9

Question

I upgraded Magento from my Magento 1.6 to 1.9 last night, and it's going error 500 Server Internal Error then my magento can't be opened. so what i'm do is chance user permissions of index.html on root folder to 644 and index.html on downloader to the same permissions and delete all file n folder in Magento cache, but it can't chance anymore. and i'm wanna to trying access the admin panel and cannot be shown and error likes this

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'group' in 'where clause', query was: SELECT COUNT(*) FROM m2epro_config AS main_table WHERE (group = '/wizard/') AND (key = 'status')

please help me to fix it out..

Answer 1

I think the error is pretty self-explanatory. It means there is no column called group.

If M2EPro 6.3.6 is not compatible, upgrade to 6.3.8. The backticks are a "feature" that has been disallowed in Magento with the SUPEE-6788 patch due to the security issues arising from previously allowing them.