[Typo3-install] Error on DAM Extensions

[KOKOU AFIDEGNON]

  I have already installed the main DAM extension in the  database. 
  adding additional extensions such as dam_ttcontent_0.1.0_t3x, dam_multimedia, dam_index gave me a fatal error with the following error message. 
   
  Fatal error: Call to undefined function: txdam_getmediatca() 
in c:\program files\easyphp1-8\www\quickstart\typo3conf\temp_CACHED_ps6167_ext_tables.php on line 2706

  First I have noticed something: the error message here is on lower caps while i visited the main script, the fuction called was on the specific file
on line 2706 has this function called 'tx_damttcontent_files' => txdam_getMediaTCA('image_field', 'tx_damttcontent_files').
  is there any way where the TYPOscript has converted all into lower caps? or is there any other dependency related to this extension that was not downloaded? 
  what is the better way to resolve this error. 
  I got all DAM extensions except those 4 above mentionned. 
  waiting for your reply
  sicnerely yours, 

		
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