Refer to the exhibit. A router$-$on$-$a$-$stick configuration was implemented for VLANs $15,30,$ and $45,$ according to the show running$-$config command output. PCs on VLAN $45$ that are using the $172\mathrm{.}16\mathrm{.}45\mathrm{.}0/24$ network are having trouble connecting to PCs on VLAN $30$ in the $172\mathrm{.}16\mathrm{.}30\mathrm{.}0/24$ network. Which error is most likely causing this problem?

The GigabitEthernet $\frac{0}{0}$ interface is missing an $P$ address

There is an incorrect IP address configured on Gigabite thernet $0/0\mathrm{.}30$

The wrong VLAN has been configured on GigabitElhernet $0/045.$

The command no shutdown is missing on GigabitEthernet $0/0\mathrm{.}30.$