STM32 + LwIP example run with some error on Problems list, why ?

[Ciuffoly]

I am able to compile and run the STM32 + LwIP example to create a little webserver.

I have modified this to switch-on relay and I will add SPI and I2S interface to connect other device like PG2310 and CT7302PL.

The compile is good and the app run but the the Problems list I see these errors, why ?

[Piranha]

Have you tried reading the text and details of those errors?