Possible duplicate of 0034783.

Can you please check why the url_get() function call in install.php line 497 is failing; could be

• failure to execute file_get_contents() => check if allow_url_fopen is enabled in php.ini
• if cURL extension is installed, did curl_exec() fail and why (try adding var_dump( curl_error( $t_curl ) ); before line 69 in url_api.php)
• if it comes to calling shell_exec(), is curl command available on the system path ?

although I have performed the steps, the error persists:

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I solved the problem! I downloaded the mantisbt-2.27.0 version again and uploaded it!
Thank you very much!

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image-5.png (81,451 bytes)   

Thanks for the feedback, glad to hear you managed to fix the problem.