Error (10219): Verilog HDL Continuous Assignment error at clock.v(66): object "hour" on left-hand side of assignment must have a net type

This error message is indicating that there is a syntax error in the Verilog code related to a continuous assignment statement. Specifically, the variable "hour" on the left-hand side of the assignment statement is not declared with a proper net type.

In Verilog, variables that are used in continuous assignment statements must be declared with a net type, such as wire or reg. If a variable is not declared with a net type, then the compiler cannot determine how to treat it in the context of the assignment statement.

To resolve this error, you should declare the "hour" variable with the appropriate net type before using it in a continuous assignment statement. For example, you could use the following syntax to declare "hour" as a wire:

wire hour;

Then, you can use "hour" in a continuous assignment statement without encountering the error.