There's also a lot of indication of poor solder flow. Blobby or irregular joints and partially filled eyelets are present, and I see several eyelets on the component side of the module where solder hasn't flowed through the eyelet and around the component lead. You should also clip the component lead ends down to the top of the solder joint and not leave "tails" protruding out of the PCB where they can cause shorts. My first suggestion would be to read through and apply the tips & techniques in this post:
viewtopic.php?f=9&t=52188
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