Please check patch files for Seo Panel version 4.2.0
It will fix following issues
-- Google keyword rank position issue(Regex not matched error)
Please do following steps to apply patches to fix above issues
1) Download patch file from following location
2) Unzip patch file.
3) Import following sql file to seo panel database using phpamyadmin
patch420/googlefix.sql
Help:
Enjoy seo panel features