Did you move/remove any core files or did you make any changes in the database?
Try to clear AbanteCart cache and check AbanteCart error log for related errors

Hello,


I have a similar  error.


warning: AbanteCart core v.1.2.15 simplexml_load_file(): /home1/bazarulc/public_html/extensions/romanian_language/admin/language/romanian/romanian.xml:744: parser error : expected '&gt;' in <b>/home1/bazarulc/public_html/core/engine/language.php</b> on line <b>569</b>


warning: AbanteCart core v.1.2.15 simplexml_load_file(): &lt;/definitions&gt; in <b>/home1/bazarulc/public_html/core/engine/language.php</b> on line <b>569</b>


warning: AbanteCart core v.1.2.15 simplexml_load_file(): ^ in <b>/home1/bazarulc/public_html/core/engine/language.php</b> on line <b>569</b>



Help me, please. 


Best regards,

Marius

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later edit :  solved.