SSL OTA update doesn't work

[borro0]

When defining UPGRADE_SSL_ENABLE, as soon as I start the ssl_upgrade_task, I continiously run into fatal excpetions:

client handshake fail: -516
ssl_free:Aviable Memory|10096
client handshake fail: -516
ssl_free:Aviable Memory|9928
client handshake fail: -516
ssl_free:Aviable Memory|9664
Fatal exception (28):
Fatal exception (9):
epc1=0x40100107
epc2=0x00000000
epc3=0x40100553
epcvaddr=0x401013cb
depc=0x00000000
▒tn_add=0x40100328