Here are ALL the warnings (yellow triangle with ! in it) messages from the build log (Message tab). Nothing looks wrong here to me ...
Warning (20028): Parallel compilation is not licensed and has been disabled
Warning (12020): Port "jdo" on the entity instantiation of "the_first_nios2_system_cpu_nios2_oci_itrace" is connected to a signal of width 38. The formal width of the signal in the module is 16. The extra bits will be ignored.
Warning (12188): OpenCore Plus Hardware Evaluation feature is turned on for the following cores
---Warning (12190): "Nios II Processor (6AF7_00A2)" will use the OpenCore Plus Hardware Evaluation feature
Warning (265072): Messages from megafunction that supports OpenCore Plus feature
---Warning (265073): Messages from megafunction that supports OpenCore Plus feature Nios II Processor
------Warning (265074): The reset input will be asserted when the evaluation time expires
Warning (265069): Megafunction that supports OpenCore Plus feature will stop functioning in 1 hour after device is programmed
Warning (12241): 2 hierarchies have connectivity warnings - see the Connectivity Checks report folder
Warning (13024): Output pins are stuck at VCC or GND
---Warning (13410): Pin "sld_hub:auto_hub|receive[0][0]" is stuck at GND