The PHP version on your server has probably been updated and now your outdated version of Evo no-longer works properly
1.0.3 is massively outdated, you need to update it for it to work
You can download the latest version from GitHub, but I think you will need to update in steps, as the jump might be to big from 1.0.3 to 1.4.7
A quick list of available downloads (although not complete) can be found
here, the latest stable version (1.4.7) can be found
here
If you struggle, post your problem / situation in the
Evolution Github page