Hi,
only to be sure, you have to execute L2A_Process with the full path to the .SAFE folder (not the path to the folder containing the .SAFE) something like this:
L2A_Process
[the_L1C_product_directory]/S2A_MSIL1C_20170307T130941_N0204_R052_T22ECQ_20170307T130935.SAFE --resolution=60