TYPO3 Core

I install cal and i got the message "Extensions suggested by extension "cal""

If i "Import now (opens a new window)" i got that error:

"Error: The datatransfer did not succeed. The T3X file could not be fetched. Possible reasons: network problems, allow_url_fopen is off, curl is not enabled in Install tool."

But if i install the extension - for example captcha - there is no error.

i use typo3 4.1 i believe it works before with 4.1...?

I ot that Error Messages:

Warning: array_keys(): The first argument should be an array in /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php on line 1718
Call Stack

1. Function Location
   1 {main}() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/index.php:0
   2 ux_sc_mod_tools_em_index->main() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/index.php:54
   3 ux_sc_mod_tools_em_index->importextfromrep() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php:534
   4 array_keys () /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php:1718

Warning: end(): Passed variable is not an array or object in /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php on line 1719
Call Stack

1. Function Location
   1 {main}() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/index.php:0
   2 ux_sc_mod_tools_em_index->main() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/index.php:54
   3 ux_sc_mod_tools_em_index->importextfromrep() /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php:534
   4 end () /data/htdocs/typo3_src-4.1/typo3/mod/tools/em/class.em_index.php:1719

ext_emconf.php:

'constraints' => array(
        'depends' => array(
            'php' => '3.0.0-0.0.0',
            'typo3' => '3.8.0-4.1.99',
        ),
        'conflicts' => array(
        ),
        'suggests' => array(
            'partner' => '',
            'tt_address' => '',
            'captcha' => '',
            'date2cal' => '',
            'rlmp_dateselectlib' => '',
            'gabriel' => '',
        ),
    ),

(issue imported from #M5338)